The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 01, 1988
Filed:
Mar. 09, 1987
Akio Matsumoto, Hyogo, JP;
Kimiaki Seki, Kasai, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
A motor drive vacuum pump comprises a motor provided with a rotor, a stator and a housing holding the rotor and the stator therein, a vacuum pump which is attached on the side surface of the motor housing and is driven by the motor to forcibly feed air from an intake port to a discharge port to thereby generate vacuum, a discharging passage means comprising a discharging hole for introducing the air to be discharged through the discharge port of the vacuum pump into the motor interior and a through hole formed in a part of the housing to discharge the air introduced into the motor interior to the atmosphere, and a discharge valve provided in a part of the discharging passage means.